Solve for x
x=-10
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3\left(-x\right)+15-21=24
Use the distributive property to multiply 3 by -x+5.
3\left(-x\right)-6=24
Subtract 21 from 15 to get -6.
3\left(-x\right)=24+6
Add 6 to both sides.
3\left(-x\right)=30
Add 24 and 6 to get 30.
-x=\frac{30}{3}
Divide both sides by 3.
-x=10
Divide 30 by 3 to get 10.
x=-10
Multiply both sides by -1.
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